Multiple stereotype casting machine



Sept. 4, 1934.

I. TQRNBERG MULTIPLE STEREOTYPE CASTING MACHINE Filed June 2. 1932 4Sheets-Sheet 1 EVE/7797' AWM Sept. 4, 1934. 1 TQR 1,972,174

MULTIPLE STEREOTYPE CASTING MACHINE Filed June 2. 1952 4 Sheets-Sheet 3.9 7 o J .2 A 15 a d @z 17 9 Q ,3 17 J 1 5 5 \VR I a i H 5' i i IMF- Q 67 .53

6 J8 J E J2 46 6 16 I fi gj TORNBERG 1,972,174

MULTIPLE STEREO TYPE CASTING MACHINE: I

4 Sheets-Sheet 4 S ept. 4, 1934.

Filed June 2. 1952 Int/820607 Patented Sept. 4, 1934 T TE TENT OFFICEMULTIPLE STEREOTYPE CASTING g MA CHINE 7 Isidor Tornberg, Plaiiifield,N. J assignor to Wood 1 7 Newspaper. Machinery Corporation, New York,

-N. 'Y., a corporation of Virginia Application 115 ,1932, 'SerialNo.614,874

type plate casting machines in which a pluralityf of molds areassociated with a single pump and means is provided by which the molds.can be general'objectsset forth above, means for -oper-:

., I filled by the pump, one after the other; 1 3

The principal object of the invention is to provide an eificient andsimple mechanism for casting a largenumber of stereotype printing platesfrom a multiplicity of molds witha single,

lo ipump and giving thexmolds time to cool between casting operationswithout interrupting the con-' tinuity'of the process of casting theplates.

'The invention also involves the application of the above describedmethod of casting'to stereotype moldsin which the matrix has to bestripped and the plate removed'between each two-casting operations in amold. 7

Other objects and advantages ofthe invention will appear hereinafter.Reference is to beha'd .to the accompanying drawingsin which,

.Fig. 1 is a'plan of a machine constituting a preferred embodiment ofthis invention; Fig. 2 is a diametrical sectional view of the same,showing'the molds and pump inelevation;

Fig. 3 is a plan of a modified form of the invention in which the moldsare indexed to their proper positions and the pump is power-operated;

vation;

automatic imeans forcontrolling the pumping 1 of 5-: metal into the moldwhen the mold reaches theposition in aicircle aroundthe furnace 1 sothat :Fig. 6 is a diametricalgsectional:view of thesame showingthe pumpand molds in sideeleva-i proper'position and'while it is in motion;

' tion;

4W Figs. '7 and 8 are detailed side elevations of. different .parts ofthe automatic controlling means;

Fig. 9 is a machine with a gravity fed melting pot constitut-' inganotherimodificationand with details eitheoperating mechanism omitted,and

Fig. 10 .is a sectional view of the pot and fan,

nace with the molds insection.

It is old to cast metal in aseries of-molds mov-.-. able, one after theother, into casting position,

- I 6 Claims. I (01'. 22-2) Fig. 4 is a diametrical sectional view ofthe: same showing the" pump-andmolds in side 818- plan of a conveyortype of casting;

matrix has to be inserted inreaoh mold for each plateand this matrix hasto be stripped from the'mold and the plate has to be removed.

"This invention involves, in addition to the ating the-pump whenthe moldis closed and thepump and mold are in registration, means for pumping.the metal into the mold operated by rotation'ofthemold about the pump,means for moving the pump, or at-yleast its spout, along in unison withthe mold as it is being poured and other features individual totheseveral modifica-;

'tions shown. Referringto Figs. land 2 the furnace'l pro-- vides asupport fora-circular supporting ring -2. 0- On this ring and extendingdown into it is mounted the metal pot 3 of .arusual well knownconstruction. On the, ring is mounted a bracket 4, which consists of aseries of arms radiating from the center. This bracket is stationary. Itsupportsat the.-center,-by a flange 1 4, a-pump 5 provided with a spout6 carrying a lug 7 This lugis provided with a cross pin on which ispivotally mounted an operating handle 8 projecting out in a convenientposition for the operator to manipulate it. This operating handle isconnected by a link 9-with a pump rod 10 on the bottom} of which is theplunger 11; Thepump is swiveled and-capableof turningon acentral axis.

When'the operating handle 8 is pulled down. 5-.

by the operator, the plunger 11' israised past a" I series'of inlet portholeslZ of the pump 5 and a predetermined quantity of metal is forcedthrough the spout 6 into one of the molds 13. There are,

a number ofthese molds placed in stationary by the 'operators pressingsideways on the handle, the spout and pump are moved around so that thespout will register -with' each mold in suc-: cession1- At this time thehandle is depressed and the next moldis filled. 7 A

'be takeni-out and the cast plateremoved. The j matrix has to bereplaced by another matrix, or the same'one, and the mold closed beforethe pumpspout getsaround to register with it again. By that time themold has time to cool and one pump can be employed to supply a number ofmolds. This is a very simplehand-operated arrangement.

. In the form of the invention shown in Figs. 3 ill) and 4, the samekind of molds 13 are employed but they are provided with flanged rollers17 at the top and bottom which run on tracks 18secured to the side ofthe furnace and in this case in circular form. Power is imparted for themovement of these molds around the track through a shaft 19 operatedfrom any desired source of power and connected to operate a rotatingwheel 20 having a pin 21. This pin cooperates with a Geneva. wheel 22 torotate it intermittently in a manner that is well understood. ThisGeneva wheel has a gear 23 meshing with a pinion'24 and thereforeoperating this pinion intermittently. As a matter of fact the pinion isrotated a complete rotation on each partial ro tation of the Genevawheel and then, of course, stops. This pinion is mounted on a shaft, 25on which there is another gear 26 meshing with a gear 27 on a jack shaft28. This shaft is provided with a pinion 29 meshing with a circular rack30 on whichthe various molds are mounted.

It will be seen therefore that these molds are all given an arcuatemotion of translation throughout a definite part of the tircle on whichthey are mounted and then stopped. When they are stopped one of them isfilled with molten metal. i 1

On each mold is carried two pairs of contacts 31 arranged in series with'each other in a circuit 34 so that only when the moldis closed and inproper angular relation with respectto the machine will' this circuit 34be closed. One pair of brushes 32, of course, is in engagement with its.contacts when the mold is in proper position and another pair33 when'the mold is closed.- This circuit 34 controls the operation of a motor35 which has a worm 36 and other gearing 3'7 operating a gear segment38. While'the circuit 34 is .closed the motor is operated to lower thisgear segment and through the link 9 raises the pump plungerrod 10 andits plunger 11. mold through the spout 6 as in the other case.

It will be seen therefore that, in the form shown in Figs. Band 4, themolds are indexed up to the proper position underneath the stationaryspout 6 and thus brought to the proper position for receiving thecharge'of molten metal. In this position one of the series of contacts32 in the motor circuit 34 is closed automatically. Pre- 50 vious tothis the mold has been closed, either by hand or otherwise, and theother pair of contacts 33 in this same circuit therefore are closed,

so that the pump is ready to operate to introduce a charge of metal intothe mold. The motor can be automatically reversed as soon as thesecontacts 32 and 33 are opened again to bring the motor back to theposition shown in Fig. 4 with the parts ready for another operation. Inthis case the pump and its operating mechanism are 60 fixed in astationary position and the molds rotate around the furnaceintermittently. The pump is supported in fixed position but otherwise iscarried about in the same manner as in Figs.

1 and 2.

In Figs. 5 to 8 inclusive the molds 13 are mounted in a similar mannerto that shown in Figs. 3 and 4 but they arerotated differently. In thiscase an operating shaft 40 acts through bevel gears directly to rotateconstantly and at a constant speed the shaft 28 and pinion 29. As

before, this pinion operates an internal circular gear 30 to which moldsare secured. This provides a constant instead of an intermittent motion.Each mold carries a stud on which is loosely mounted a lever 46 which isnormally held This fills the in the position shown in Fig. 'I by aspring 4'7. This spring acts not only as a torsion spring but as acompression spring to hold the lever 46 over against the mold 13, asshown in Fig. 8.

Thus, it will be seen that with the mold open, as shown in Fig. 8, aprojection 48 on the lever 46 will pass by a-projection 49 on the pumpspout 6, without operating the pump. However, when the mold is closed,pins 51 thereon are forced by the movable half of the mold 13 to pressthe lever 46 to the right so that the projections 48 and 49 register.

At this time a roller 52 carried on the rod 46 engages on a stationarycam 53. This contact of the two projections causes the pump spout 6 tomove from the dotted line position in Fig. 5 to the full line position.It moves in synchronism of course with the motion of the mold 13 whichisatthat time closed and in casting position.

All the other molds are open. The motion of this spout is employedtooperatethe pump 5 to and mold are moving from dotted to full lineposition, as shown in Fig; 5. v a

- The operation of thepump is accomplished in the following manner. Onthe stationary-ring 2 is fixed a rack segment 55 and with this segmentmeshes a pinion 56 carried on a shaft 57 mounted in bearings on the pumpspout. On the other end of the shaft is a pinion 58 which meshes with avertical rack 591carried. by the pump .rod 10. Therefore the movement ofthe spout, as indicated in Fig. 5, rotates the shaft 57 and raises thepump rod 10 and plunger 11 to deposit a charge of cast metal in the moldas the mold moves along with, the spout. .Whenremove the plates, placethem in the conveyor,

change the matrices and close up the molds preparatory to re-casting.This is a continuous operating device as far as the molds are concernedand an intermittent pump.

In Figs. 9 and 10 is shown an elevated type of melting pct 64 carried bythe stationary ring 2.

The bottom of this pot carries a rotary valve. 65

for cooperating with molds 13 as they are brought into positionregistering with the opening through this valve. A chain 66 is attachedto each of the molds l3 and provides means for moving the molds in acontinuous series into and out of casting position. The molds aresupported to run ontracks as in Figs. 3 to 8. N0 means is shown foroperating the valve or the chain as they can be operated automaticallyor manually in any desired way. A non-circular path for the molds may beused as shown so' that the molds may move in a straight-line past thefilling valve 65. It will be seen that here is a gravity feedingmelting-pot in connectionwith a conveyor for moving the molds preferablyintermittently into casting position and moving them away again.Although I have illustrated and described only fourform's of theinvention I am aware of the fact that other modifications can be madetherein by any person skilled in the art without departing from thescope of the invention as expressed in the claims. Therefore, I do notwish to be limited in this respect otherwise than as set forth in theclaims, but what I do claim is:--

1. In a multiple stereotype plate casting machine, the combination witha furnace, a melting pot supported thereby, and a pump supported by thefurnace and extending down into the melting pot and having a spoutprojecting out of the furnace, of a series of molds supported outsidethe furnace, a motor foroperating said pump, said molds each consistingof two parts, one of which is adapted to be moved to open and close themold, contacts on the mold in series with the circuit for supplyingpower to the mo tor, and means whereby when a mold in casting positionis closed the circuit will be completed and the motor will operate tofill that mold with metal.

2. In a multiple stereotype plate casting machine, the combination witha furnace, a melting pot supported thereby, a pump supported by thefurnace and comprising a piston, means supported by the furnace foroperating the piston to lift and discharge one mold full of metal ateach stroke, a series of stereotype plate molds supported on the outsideof said furnace and adapted to be moved into position to receive metalfrom said pump, and means whereby when a mold is closed and moved intoproper position for receiving metal from the pump, the piston will beautomatically moved to discharge a full charge of metal into the moldand whereby, if the mold is moved into proper position while open, thepiston will not be actuated.

3. In a multiple stereotype plate casting machine, the combination witha melting pot, a pump therein and electrically operated means foroperating the pump, of a series of molds, an electric circuit forsupplying power to the electrically operated means, two sets of contactsarranged in series with said circuit, means for closing one of said setsof contacts when a mold is closed, and means for closing the other whenthe mold is in proper position for receiving metal from the pump,whereby the pump will not operate until the mold is closed and in properposition.

4. In a multiple stereotype plate casting machine, the combination witha pump comprising a plunger and a rod thereon, said pump being adaptedto turn about the axis of the rod, a concentric track, a series ofmoldsadapted to move around said track in a circle, means for movingsaid molds constantly around said track at a constant speed, astationary rack, a shaft carried by the pump and having a pinion adapted'to mesh with the rack so that when the pump moves the pinion along therack, the shaft will be turned, means on said shaft for operating thepump to discharge metal into the mold while it is moving, and yieldingmeans for moving the pump back to original position after the mold hasbeen filled.

5. In a multiple stereotype plate casting machine, the combination of apump having a reciprocating piston and rod provided with a rack foroperating it, a shaft having a pinion meshing with the rack and a secondpinion, a. stationary arcuate rack meshing with the second pinion, meansfor rotating a series of molds around in a path concentric with the pumprod,

means for moving the pump with a mold when it almost reaches castingposition and thereby moving said pinion over the rack and operating thepiston, a cam in stationary position adapted to keep the pump connectedwith the mold throughout a certain arc and to disconnect the pump fromthe mold after that are has been traveled, and yielding means for thenreturning the pump to its initial position.

6.'The combination of a furnace, a melting pot carried at the topthereof, a valve at the bottom of the pot adapted to be turned'to allowmetal to escape from the pot, a series of molds movable about thefurnace, located below the pot, and adapted to come in registration withthe valve once during each rotation, a track for supporting said mold,saidtrack being non-circular and having aflat side at the point wherethe valve is located, and means connected with the molds for moving themaround the track. ISIDOR TORNBERG.

